Brand Attribution is the process of determining when, where, and how a brand is recognized, referenced, or credited within AI-generated content, search results, or digital interactions. In the context of AI Search Optimization, it measures whether large language models (LLMs) such as ChatGPT, Claude, or Gemini correctly associate factual statements, insights, or recommendations with the right brand entity. Effective brand attribution depends on a strong identity graph, consistent structured data, and corroborated external references—ensuring that when AI systems generate answers, the brand’s name and authority are explicitly linked to the information they provide.